What is LiDAR?
LiDAR (light detection and ranging) measures distance with laser pulses to build a 3D point cloud of the surroundings; robots and robotaxis use it to see depth precisely.
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Definition
LiDAR is a sensor that measures distance using light. By scanning laser pulses across a scene it produces a point cloud: a precise 3D map of everything around the sensor.
Where it is used
- Robotaxis and trucks (robotaxi) use roof and bumper LiDARs to detect cars, people and curbs.
- Mobile robots and humanoids use compact 3D LiDARs for mapping and obstacle avoidance — e.g. Unitree's G1+ (story).
- Safety: detecting people near industrial robots.
Why it matters
Falling LiDAR prices have made precise 3D perception affordable for small robots. The camera-only vs. LiDAR debate remains one of autonomy's biggest design choices — see also Level 4 autonomy.
Frequently asked questions
How does LiDAR work?
It fires laser pulses and times how long reflections take to return; millions of measurements per second form a 3D point cloud.
LiDAR vs cameras: which is better?
LiDAR gives direct, accurate depth and works in the dark; cameras are cheaper and see color and texture. Many robots and robotaxis fuse both, while Tesla relies on cameras.
Do humanoid robots use LiDAR?
Many do. Unitree's G1+ (2026) combines head stereo cameras, a chest wide-angle camera and a 3D LiDAR.
Coverage
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On a Unitree G1, Galbot's planner–tracker stack finished 50 unseen physical layouts without falls; 45 were contact-free. Destination success in sim was 98.67% — contact-free 70.3%.
Unitree's upgraded G1+ humanoid goes on pre-order in Japan
GMO AIR began Japanese pre-orders for the G1+ on Oct 13: a neck, stronger motors, 3D LiDAR and voice interaction. Founder Wang Xingxing now sees an embodied-AI tipping point in 1–2 years.
Agility's Digit 5 is built to work next to people — no fences
Agility Robotics' fifth-generation humanoid adds human detection and an independent safety controller, backed by $300M+ in conditional orders; early access in H1 2027.
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